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- It is the only approach which allows you to directly serialize the nested hash strcture to file and back through a seamless interface.
- It is implemented in C which should give some performance advantage over the other two modules implemented in Perl.
I I have already tested this approach in JKFlow and it successfully marshalls and unmarshalls the complex nested hash based data strcutures in JKFlow by simply passing a reference to the root of the nested structure to its component sub-routines. Follwoing is the description of how to use the module.
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Usage of the Storable Module
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Storable
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is
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a
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C
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extension
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module
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for
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serializing
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data
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directly
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to
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files
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and
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is
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the
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fastest
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of
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the
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three
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approaches.
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The
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store
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function
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takes
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a
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reference
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to
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a
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data
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structure
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(the
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root)
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and
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the
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name
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of
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a
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file.
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The
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retrieve
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method
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does
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the
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converse:
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given
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a
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filename,
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it
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returns
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the
...
root:
| Code Block |
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use Storable; $a = [100, 200, {'foo' => 'bar'}]; eval { store($a, 'test.dat'); }; print "Error writing to file: $@" if $@; $a = retrieve('test.dat'); If you have more than one structure to stuff into a file, simply put all of them in an anonymous array and pass this array's reference to store. You can pass an open filehandle to store_fd instead of giving a filename to store. The functions nstore and nstore_fd can be used for storing the data in "network" order, making the data machine-independent. When you use retrieve or retrieve_fd, the data is automatically converted back to the native machine format (while storing, the module stores astoresa flag indicating whether it has stored it in a machine-independent format or not). |